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1.
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D. F. Paget 《BIT Numerical Mathematics》1981,21(2):212-220
A quadrature rule is described for evaluating finite-part (f.p.) integrals of the form
, witha 1. The rule is obtained by interpolating tof by a polynomial which coincides withf at the shifted zeros of a Legendre polynomial. 相似文献
3.
Well-ordered clean InAs(1 1 1) A and B surfaces have been prepared using HCl-isopropanol solutions and characterized using low-energy electron diffraction and photoemission spectroscopy. The as-treated surfaces are covered by a layer containing arsenic and small amounts of InClx. Annealing induces desorption of the overlayer and reveals (2 × 2) and (1 × 1) structures on the A and B surfaces, respectively. For both surfaces, the surface components of the In 4d and As 3d reveal a charge transfer from the electropositive surface indium to the electronegative surface arsenic. The major advantage of this preparation method over conventional thermal cleaning is a significant reduction in the annealing temperature (≈250 °C) thereby avoiding anion evaporation. 相似文献
4.
Summary An algorithm is described for numerically evaluating Cauchy principal value (c.p.v.) integrals of the type. The remainder is expressed as a contour integral, from which realistic asymptotic estimates are obtained. 相似文献
5.
We define permutation modules and Young modules for the Brauer algebra B
k
(r,δ), and show that if the characteristic of the field k is neither 2 nor 3 then every permutation module is a sum of Young modules, respecting an ordering condition similar to that
for symmetric groups. Moreover, we determine precisely in which cases cell module filtration multiplicities are well-defined,
as done by Hemmer and Nakano for symmetric groups.
Supported by the European Community through Marie Curie fellowship MCFI 2002-01325
Supported by EPSRC grant GR/S18151/01 相似文献
6.
7.
In the present work HCl-isopropanol treated and vacuum annealed InP(0 0 1) surfaces were studied by means of low-energy electron diffraction (LEED), soft X-ray photoemission (SXPS), and reflectance anisotropy (RAS) spectroscopies. The treatment removes the natural oxide and leaves on the surface a physisorbed overlayer containing InClx and phosphorus. Annealing at 230 °C induces desorption of InClx overlayer and reveals a P-rich (2 × 1) surface. Subsequent annealing at higher temperature induces In-rich (2 × 4) surface. The structural properties of chemically prepared InP(0 0 1) surfaces were found to be similar to those obtained by decapping of As/P-capped epitaxial layers. 相似文献
8.
9.
Dennis A. Edwards Mary F. Mahon Timothy J. Paget 《Journal of chemical crystallography》1996,26(5):361-364
Diphenylphosphinylacetic acid crystallizes in the monoclinic space groupP2l/n with unit cell dimensionsa=5.6875(7),b=17.049(4),c=13.471(2) Å, =93.36(1)° and Z=4. The molecular packing consists of hydrogen bonded chains arising from intermolecular interactions between a carboxylic acid hydroxyl group and an oxygen of an adjacent phosphine oxide moiety. 相似文献
10.
The class of cellularly stratified algebras is defined and shown to include large classes of diagram algebras. While the definition
is in combinatorial terms, by adding extra structure to Graham and Lehrer’s definition of cellular algebras, various structural
properties are established in terms of exact functors and stratifications of derived categories. The stratifications relate
‘large’ algebras such as Brauer algebras to ‘smaller’ ones such as group algebras of symmetric groups. Among the applications
are relative equivalences of categories extending those found by Hemmer and Nakano and by Hartmann and Paget, as well as identities
between decomposition numbers and cohomology groups of ‘large’ and ‘small’ algebras. 相似文献